A kind of transmission method of carrier wave scheduling information and device thereof
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of transmission method of carrier wave scheduling information and device thereof.
Background technology
At LTE (Long Term Evolution, Long Term Evolution) in system, the information of descending control and the information of uplink scheduling are at DCI (Downlink Control Information, Downlink Control Information) in, carry, PDCCH on each carrier wave (Physical Downlink Control Channel, Physical Downlink Control Channel) information is indicated the schedule information on this carrier wave.Different DCI format (DCI form) distinguishes by length.For LTE-A system, can support the polymerization between different bandwidth, by the resource of a plurality of LTE carrier waves (claiming again member carrier) is coupled together, make for obtaining higher data rate, and can support the polymerization between continuous carrier and between discontinuous carrier wave.Fig. 1 shows the polymerization situation between discontinuous carrier wave.
In previous meeting aspect the descending control of LTE-A in the discussion about PDCCH, selection for combined coding and absolute coding scheme has mainly been discussed, as shown in Figure 2, wherein method 2 and 3 (Alternative 2 in figure and Alternative 3) is the mode of combined coding, and method 1 and 4 (Alternative1 in figure and Alternative 4) is the mode of absolute coding.For the mode of combined coding, the amount of overhead of information can be less; And for the mode of absolute coding, will be better for the compatibility of R8.Through the repeatedly discussion of meeting, for the processing of PDCCH, substantially determined the mode of supporting absolute coding, that is, one or more carrier waves of PDCCH information points on a carrier wave, can have the carrier wave indication information of 3 bits.
According to above-mentioned conclusion, mainly there is two schemes in current PDCCH indicating means:
Scheme 1: only indicate the schedule information on this carrier wave.Base station independently sends PDCCH at each member carrier, and this PDCCH only can dispatch the physical resource in this member carrier, and as shown in Figure 3, the benefit of this method is, better with the compatibility of R8 system, the probability of PDCCH blocking is lower, and power-balance;
Scheme 2: be by indicate the schedule information on other carrier wave across carrier dispatching, can dispatch by a plurality of PDCCH on a member carrier physical resource of other member carrier, each PDCCH can only dispatch the resource of a member carrier, as shown in Figure 4, on a plurality of PDCCH of the DCI of carrier wave 3, can transmit respectively the schedule information of carrier wave 1,2,3,4,5.The main advantage of this scheme is, the flexibility of scheduling is higher, can carry out preferably interference coordination.
Through the repeatedly discussion of meeting, determine that scheme 1 and scheme 2 can be used in LTE-A system, base station can be switched flexibly in this two schemes, determined that the configuration across carrier dispatching is UE-specific simultaneously, need UE (User Equipment, subscriber equipment) at UE-specific space blind check DCI, as long as and configured across carrier dispatching, the CIF (carrier wave indication territory) that will add 3 bits in DCI is across carrier dispatching with what indicate base station configuration.
In LTE system, terminal need to be carried out blind Detecting to the PDCCH of public (Common) search volume and user-specific (UE-specific) search volume simultaneously, and the CCE of PDCCH (carrier wave) polymerization grade can be 1,2,4,8.Under every kind of CCE polymerization grade, it is different needing the number of the candidate PDCCH of blind check, in the 9.1.1 of 3GPP TS36.213, has provided description, specifically as shown in Figure 5.
For every kind of transmission mode, need two kinds of DCI forms of blind check, be to distinguish by length between different DCI simultaneously, and UE is according to different polymerization grades, and blind check is 44 times at most, and wherein Common search volume is 12 times, 32 times, UE-specific search volume.
In Common search volume, only there is the DCI of two kinds of length.In UE-specific search volume, according to the difference of transmission mode, UE needs the DCI of blind check different-format, and every kind of transmission mode is the length of only corresponding two kinds of DCI also, specifically as shown in Figure 6.
In the process of reshuffling at RRC, as shown in Figure 7, first base station can be passed through RRC (RadioResource Control, Radio Resource is controlled) connection and reshuffle (RRCConnectionReconfiguration) notice UE reconfiguration message.UE receives after this information, can carry out the operation of reprovision, after reprovision completes, UE sends RRC connection and has reshuffled (RRCConnectionReconfigurationComplete) information in corresponding resource according to the dispatch command of base station, complete the process of reprovision.
The situation that likely there will be base station and user that DCI length is understood differently and caused in the process of reprovision, namely base station has sent after RRCConnectionReconfiguration information, base station does not know when UE has completed the process of reprovision, so base station does not know which type of configuration to send dispatch command to UE with.In R8 system, for fear of this situation, when reshuffling, with DCI format1A, carry dispatch command.
And in carrier aggregation system, in base station configuration across carrier dispatching or non-during across carrier dispatching from being configured to across carrier dispatching, base station does not know when UE has completed the renewal of configuration, therefore UE is in the process of reshuffling, the situation that there will be base station and UE to understand differently and cause for the DCI length that needs blind check, causes occurring mistake in blind check DCI process.As shown in Figure 8, eNB (base station) sends after RRCConnectionReconfiguration message to UE, when also not receiving the RRCConnectionReconfigurationComplete message that UE returns, send PDCCH (DCI 0), this may cause UE for needing the DCI length of blind check to understand different from eNB.
For this problem, the solution proposing at present has:
(1) DCI of two kinds of length of base-station transmission, but the signaling consumption that this scheme causes can be many;
(2) utilize the process of RACH (Random Access Channel, Random Access Channel), but this scheme need to redefine preamble sequence (pilot frequency sequence), larger to the change of standard;
(3) with the DCI of common search volume, transmit RRCConnectionReconfiguration and RRCConnectionReconfigurationComplete information, but because the size in common space is limited, and must remove to pass with the larger degree of polymerization DCI in common space, so the probability of PDCCHblocking can be larger;
(4) guarantee that a DCI on carrier wave does not add CIF, but this scheme need to define new search volume.
Inventor, in realizing process of the present invention, finds that prior art at least exists following defect:
For base station, configure across carrier dispatching or non-across carrier dispatching from being configured to across carrier dispatching, understanding for DCI between base station and UE may be inconsistent, UE is when UE-specific space blind check DCI, to likely DCI can not accurately be detected, in handoff procedure, occur the situation that base station and user understand differently and cause DCI length, current scheme all can not well address this problem.
Summary of the invention
Embodiments of the invention provide a kind of carrier dispatching method for sending information and device thereof, the problem that the base station that may occur while configuring across carrier dispatching in order to solve in existing carrier aggregation system and user understand differently and cause DCI length.
The carrier dispatching method for sending information that the embodiment of the present invention provides, comprising:
Network side is determined the scheduling indicating mode of subscriber equipment;
Non-during across carrier dispatching when being defined as, in the DCI of the exclusive search volume of described subscriber equipment, add carrier wave indication CIF information field, the value of described CIF information field is made as the value with subscriber equipment agreement;
When being defined as across carrier dispatching, in the DCI of the exclusive search volume of described subscriber equipment, add CIF information field, the value of described CIF information field is the carrier index of the carrier wave dispatched of DCI.
The carrier dispatching information transmitting apparatus that the embodiment of the present invention provides, comprising:
Carrier dispatching determination module, for determining the scheduling indicating mode of subscriber equipment;
Carrier dispatching module, non-during across carrier dispatching for being defined as when described carrier dispatching determination module, in the DCI of the exclusive search volume of described subscriber equipment, add carrier wave indication CIF information field, the value of described CIF information field is made as the value with subscriber equipment agreement; Or, when described carrier dispatching determination module is defined as across carrier dispatching, in the DCI of the exclusive search volume of described subscriber equipment, adding CIF information field, the value of described CIF information field is the carrier index of the carrier wave dispatched of DCI.
In the above embodiment of the present invention, if use non-across carrier dispatching to subscriber equipment, in the DCI of the exclusive search volume of described subscriber equipment, add carrier wave indication territory CIF information, the value of this CIF information is made as the value that pre-defines (in advance with the value of subscriber equipment agreement); If user is used across carrier dispatching, in the DCI of the exclusive search volume of described subscriber equipment, add CIF information, the carrier index of the member carrier that this DCI of this CIF message identification dispatches.Like this, because the DCI of the exclusive search volume of subscriber equipment has CIF territory before configuration and after configuration, therefore when configuration is across carrier dispatching and across carrier dispatching and non-while switching between across carrier dispatching, the situation that there will not be base station and UE to understand differently and cause for DCI length, thus the problem that may occur avoided in layoutprocedure.
Accompanying drawing explanation
Fig. 1 is the polymerization schematic diagram between the discontinuous carrier wave of existing LTE system;
Fig. 2 is that the descending control of existing LTE-A aspect is about PDCCH indication scheme schematic diagram;
Fig. 3 is the schematic diagram that in existing LTE-A system, PDCCH only dispatches this carrier wave;
Fig. 4 be in existing LTE-A system PDCCH across the schematic diagram of carrier dispatching;
Fig. 5 is PDCCH blind check candidate collection schematic diagram in prior art;
Fig. 6 is the schematic diagram of different transmission mode in prior art;
Fig. 7 is that in prior art, RRC reshuffles schematic flow sheet;
Fig. 8 is that the base station and the user that when in prior art, configuration is across carrier dispatching, occur understand differently and cause problem schematic diagram DCI length;
The schematic flow sheet for the scheduling of R10UE indication carrier wave that Fig. 9 provides for the embodiment of the present invention;
It is non-across carrier wave with across the schematic diagram of carrier dispatching DCI in the embodiment of the present invention that Figure 10 A, Figure 10 B are respectively;
The base station equipment structure schematic diagram that Figure 11 provides for the embodiment of the present invention.
Embodiment
The problems referred to above that exist for prior art, the embodiment of the present invention provides a kind of technical scheme of transmitting carrier dispatching information, and base station and the user that while configuring across carrier dispatching to solve, may occur understand differently and cause problem DCI length.
In the embodiment of the present invention, for R10 user (being LTE-A Release10 system user), requirement all adds CIF all the time at the DCI in its UE-specific space format, and the CIF value in DCI is defined, wherein, when configuration is not across carrier dispatching, the value of the CIF in this DCI is the fixed value of setting; When having configured across carrier dispatching, the CIF in DCI identifies the carrier index of the carrier wave of this DCI scheduling, by this DCI, is the schedule information of UE indication member carrier.Like this, for UE, when DCI blind check is carried out in its UE-specific space, the DCI can correct understanding base station sending, solved that the DCI length that can not correct understanding base station sends because of UE causes across carrier wave configuration with non-across carrier wave, configure between DCI test problems in handoff procedure.
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is carried out to clear, complete description, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope of protection of the invention.
In LTE system, when UE just starts shooting, first it can be operated under single carrier mode; In the process that this UE and base station connect, can report the version number of oneself; The version number that base station reports according to UE, if find that this UE is R10 subscriber equipment, when base station is for this UE transmission carrier dispatching information, in DCI, all to add CIF, the UE-specific dispatch command for this UE all needs to add CIF all the time, otherwise, can process according to old process the UE-specific dispatch command of this UE.
Referring to Fig. 9, for being the flow process of R10UE transmission carrier dispatching information in the embodiment of the present invention, as shown in the figure, this flow process can comprise the steps:
Step 901, network side (normally base station) are determined carrier dispatching configuration mode for the DCI of a carrier wave of object UE;
If step 902 base station determines this object UE not carry out across carrier dispatching, perform step 903; If determine this object UE to use this DCI to carry out across carrier dispatching, perform step 904.
In this step, alleged not carrying out refers to across carrier dispatching, at the member carrier of this DCI, independently sends PDCCH, and this PDCCH only can dispatch the physical resource in this member carrier, as shown in Figure 3; Alleged referring to across carrier dispatching in this step, dispatches the physical resource of other member carrier by a plurality of PDCCH on the member carrier of this DCI, and each PDCCH can only dispatch the resource of a member carrier, as shown in Figure 4.
Step 903, base station are carried on DCI by carrier dispatching information, and add CIF in this DCI, and this CIF is a fixed value, and the carrier dispatching information of wherein carrying is all the schedule information for the physical resource of this member carrier.
In this step, this fixed value pre-defines, and appoints with UE in advance, as this value can be taken as " virtual CRC " (virtual CRC check code), is used for reducing PDCCH probability of false detection.
As shown in Figure 10 A, after the CIF that the value of adding is the fixed value set in DCI of base station, this DCI is transmitted on user-specific search volume, UE searches after the PDCCH of this member carrier in its exclusive search volume like this, can reduce PDCCH probability of false detection according to CIF value pre-set in this DCI.Wherein, according to current mechanism, the RRC that UE can send by base station (Radio ResourceControl, Radio Resource is controlled) signaling knows whether be configured to across carrier dispatching.
Step 904, base station are carried on DCI by carrier dispatching information, and add CIF in this DCI, and the value of this CIF is the carrier index of member carrier, express the schedule information of the member carrier (being the indicated carrier wave of CIF) being scheduled.
As shown in Figure 10 B, after the CIF that the value of adding is carrier index in DCI of base station, this DCI is transmitted on user-specific search volume, UE searches after the PDCCH of this member carrier in its exclusive search volume like this, can determine according to the CIF in the DCI of this member carrier the carrier dispatching information of carrying in this DCI is to dispatch which member carrier.
Step 905, base station send to the DCI that has added CIF in UE-specific (user-specific search volume) space of this object UE.
For R10UE, if UE searches in its UE-specific search volume, and search DCI, according to the CIF in this DCI, obtain corresponding carrier dispatching information, and can carry out carrier dispatching according to the carrier dispatching information getting.Wherein, if configuration is not across carrier dispatching for UE, to determine the CIF that in DCI, PDCCH is corresponding be pre-set fixed value to UE so, and dispatch the physical resource on this member carrier according to corresponding schedule information; If UE has configured across carrier dispatching, in this DCI, CIF corresponding to PDCCH is carrier index so, and UE is according to corresponding schedule information, and the physical resource on the indicated member carrier of this CIF is dispatched.
In above-mentioned flow process, the length of CIF can be 3 bit lengths of fixing.
By above flow process, can find out, on the one hand, if R10 user is not configured across carrier dispatching, the PDCCH on all carrier waves of this user can only carry the dispatch command on this carrier wave and corresponding up-link carrier.Now CIF territory exists, and the value of CIF is made as fixed value.If this user has configured across carrier dispatching, now CIF territory exists equally, and the value of CIF is exactly corresponding carrier index.When configuring across carrier dispatching, because the DCI in R10 user's UE-specific space is the CIF territory that has 3 bits before configuration and after configuration, therefore the situation that there will not be base station and UE to understand differently and cause for DCI length when configuration is across carrier dispatching, thus the problem of the DCI flase drop that may occur avoided in layoutprocedure.
On the other hand, the DCI that need to transmit two kinds of length with base station in prior art is to avoid base station and user to compare the DCI length scheme causing that understands differently, and the embodiment of the present invention has been saved signaling consumption; Utilize RACH process to avoid base station and user to compare the DCI length scheme causing that understands differently with prior art, the embodiment of the present invention does not need to redefine pilot frequency sequence, thereby little to the change of standard; Use the DCI transmission carrier dispatching information of common search volume transmission to compare with prior art, because the embodiment of the present invention is used UE-specific space transmission carrier dispatching information, thereby reduced the probability of PDCCH blocking; Do not add CIF to avoid base station and user to compare the DCI length scheme causing that understands differently with guaranteeing a DCI on carrier wave in prior art, the embodiment of the present invention does not need to define new search volume.
Technical conceive based on identical, the embodiment of the present invention also provides a kind of carrier dispatching information carrying means.This installs normally base station equipment.
As shown in figure 11, the carrier dispatching information carrying means that the embodiment of the present invention provides, can comprise: carrier dispatching determination module 1101 and carrier dispatching module 1102, wherein:
Carrier dispatching determination module 1101, for determining the scheduling indicating mode of subscriber equipment;
Carrier dispatching module 1102, non-during across carrier dispatching for being defined as when carrier dispatching determination module 1101, in the DCI of the exclusive search volume of this subscriber equipment, add CIF, the value of described CIF is made as the value pre-defining, the value of appointing with subscriber equipment; Or, when carrier dispatching determination module 1101 is defined as across carrier dispatching, in the DCI of the exclusive search volume of this subscriber equipment, adding CIF information, the value of described CIF is the carrier index of the member carrier dispatched of DCI.The length of above-mentioned CIF can be set to 3 bits.
In said apparatus, carrier dispatching module 1102 is not when configuration is across carrier dispatching, and set CIF can be the virtual CRC of DCI.
In said apparatus, carrier dispatching module 1102 can be specifically for, when carrier dispatching determination module 1101 is defined as non-ly while being LET-A Release10 subscriber equipment across carrier dispatching and described subscriber equipment, in the DCI of the exclusive search volume of described subscriber equipment, add the CIF of pre-defined value; Or when carrier dispatching determination module 1101 is defined as being LET-A Release10 subscriber equipment across carrier dispatching and described subscriber equipment, in the DCI of the exclusive search volume of described subscriber equipment, the value of adding is the CIF of member carrier numbering.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can be distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.